# US 8,783,867 B2 · Image capture apparatus and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,867 B2 - Document ID: US8783867B2 - Status: Granted - Kind: B2 - Application number: 13/023,814 - Filed: 2011-02-09 - Published: 2011-08-18 - Granted: 2014-07-22 - Earliest claimed: 2010-02-17 - Assignees: Canon Kabushiki Kaisha - Applicants: Kenji Muto - Inventors: Kenji Muto - Web page: https://patentgrep.com/patent/US8783867B2 ## CPC - A61B 3/102: {for optical coherence tomography [OCT]} - A61B 3/14: Arrangements specially adapted for eye photography - A61B 3/15: with means for aligning, spacing or blocking spurious reflection {; with means for relaxing} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract It has been very cumbersome to determine whether or not alignment is required before the fundus image is acquired after the tomographic image is acquired, causing the reduction in diagnostic efficiency. An ophthalmic apparatus is provided to solve this problem, which comprises an irradiation unit that irradiates an eye to be inspected with a first beam for acquiring a tomographic image of the eye and a second beam for acquiring a fundus image of the eye, the second beam having a beam diameter larger than the beam diameter of the first beam; and a determination unit that, based on information indicating a shift amount between an irradiation position of the first beam in the eye and an ocular axis of the eye, determines whether or not the irradiation position of the second beam falls within a range in which the fundus image can be acquired. ## Claims ### Claim 1 An ophthalmic apparatus comprising: an irradiation unit configured to irradiate an eye to be inspected with a first light to capture a tomographic image of the eye to be inspected and with a second light to capture a fundus image of the eye to be inspected, the diameter of an irradiation area of the second light in the eye to be inspected being larger than the diameter of an irradiation area of the first light in the eye to be inspected; and a determination unit configured, based on information indicating a shift amount between an irradiation position of the first light in the eye to be inspected and an ocular axis of the eye to be inspected, to determine whether or not the irradiation position is within a range in which the fundus image can be captured. ### Claim 2 (depends on 1) The ophthalmic apparatus according to claim 1, further comprising a display control unit configured to control a display unit to display a warning when the determination unit determines that the irradiation position of the first light is out of the range. ### Claim 3 (depends on 2) The ophthalmic apparatus according to claim 2, wherein in response to the warning, a wait state occurs in the ophthalmic apparatus during which a selection by an operator is awaited of whether or not an irradiation position of the second light is to be changed. ### Claim 4 (depends on 1) The ophthalmic apparatus according to claim 1, further comprising a changing unit configured, when the determination unit determines that the irradiation position of the first light is out of the range, to change the diameter of the irradiation area of the second light in the eye to be inspected to a smaller diameter. ### Claim 5 (depends on 4) The ophthalmic apparatus according to claim 4, arranged to capture a fundus image of the eye to be inspected using the second light , the second light being visible light and being changed according to the changing of the changing unit. ### Claim 6 (depends on 1) The ophthalmic apparatus according to claim 1, further comprising a movement unit configured, when the determination unit determines that the irradiation position of the first light is out of the range, to move an irradiation position of the second light with respect to the eye to be inspected. ### Claim 7 (depends on 6) The ophthalmic apparatus according to claim 6, the apparatus being arranged to capture a fundus image of the eye being inspected using the second light, the second light being visible light and being positioned with respect to the eye being inspected according to the movement of the movement unit. ### Claim 8 (depends on 1) The ophthalmic apparatus according to claim 1, wherein the determination unit is configured to make the determination based on at least one of brightness of the fundus image of the eye to be inspected in the irradiation position of the first light and a distance between the fundus image and the ocular axis. ### Claim 9 (depends on 1) The ophthalmic apparatus according to claim 1, wherein the irradiation unit is configured to generate a fundus image of the eye to be inspected using infrared light, and wherein the determination unit is configured to make a determination, based on the infrared fundus image, regarding whether the irradiation position of the second light will be within the range. ### Claim 10 (depends on 1) The ophthalmic apparatus according to claim 1, wherein the irradiation unit is configured to irradiate, when the irradiation position of the first light is within the range, the eye to be inspected with the second light. ### Claim 11 An ophthalmic apparatus comprising: an irradiation unit configured to irradiate an eye to be inspected with a first light to capture a tomographic image of the eye to be inspected and a second light to capture a fundus image of the eye to be inspected, the diameter of an irradiation area of the second light in the eye to be inspected being larger than the diameter of an irradiation area of the first light in the eye to be inspected; and a movement unit configured to, when an irradiation position of the first light in the eye to be inspected is out of a range, move an irradiation position of the second light with respect to the eye to be inspected. ### Claim 12 (depends on 11) The ophthalmic apparatus according to claim 11, the apparatus being arranged to capture a fundus image of the eye to be inspected using the second first, the second first being visible light being positioned according to the movement of the movement unit. ### Claim 13 An ophthalmic apparatus comprising: an irradiation unit configured to irradiate an eye to be inspected with a first light to capture a tomographic image of the eye to be inspected and a second light to capture a fundus image of the eye to be inspected, the second light having a diameter of an irradiation area in the eye to be inspected larger than the diameter of an irradiation area of the first light in the eye to be inspected; and a changing unit configured, when an irradiation position of the first light in the eye to be inspected is out of a range, to change the diameter of the irradiation area of the second light in the eye to be inspected to a smaller diameter. ### Claim 14 (depends on 13) The ophthalmic apparatus according to claim 13, the apparatus being arranged to capture a fundus image of the eye to be inspected using the second light, the second light being visible light and being changed according to the changing of the changing unit. ### Claim 15 An ophthalmic apparatus comprising: an irradiation unit configured to irradiate an eye to be inspected with a first light to capture a tomographic image of the eye to be inspected and a second light to acquire a refractive power of the eye to be inspected, the second light having a diameter of an irradiation area in the eye to be inspected larger than the diameter of an irradiation area of the first light in the eye to be inspected; and a determination unit configured, based on information indicating a shift amount between an irradiation position of the first light in the eye to be inspected and an ocular axis of the eye to be inspected, to determine whether or not the irradiation position is within a range in which the refractive power can be acquired. ### Claim 16 (depends on 15) The ophthalmic apparatus according to claim 15, wherein the irradiation unit is configured to irradiate, when the irradiation position of the first light is within the range, the eye to be inspected with the second light. ### Claim 17 An ophthalmic method comprising: irradiating an eye to be inspected with a first light to capture a tomographic image of the eye to be inspected; determining, based on information indicating a shift amount between an irradiation position of the first light in the eye to be inspected and an ocular axis of the eye to be inspected, whether or not the irradiation position is within a range in which a fundus image of the eye to be inspected can be captured; and irradiating, when the irradiation position of the first light is within the range, the eye to be inspected with a second light to capture the fundus image, wherein the diameter of an irradiation area of the second light in the eye to be inspected is larger than the diameter of an irradiation area of the first light in the eye to be inspected. ### Claim 18 (depends on 17) A non-transitory computer-readable storage medium for storing a computer program that causes a computer to execute the ophthalmic method according to claim 17. ### Claim 19 (depends on 17) The ophthalmic method according to claim 17, further comprising controlling a display unit to display a warning when the determining step determines that the irradiation position of the first light is out of the range. ### Claim 20 (depends on 17) The ophthalmic method according to claim 17, wherein in response to the warning, a wait state occurs during which a selection by an operator is awaited of whether or not an irradiation position of the second light is to be changed. ### Claim 21 (depends on 17) The ophthalmic method according to claim 17, further comprising changing, when the irradiation position of the first light is out of the range, the diameter of the irradiation of the second light in the eye to be inspected to a smaller diameter. ### Claim 22 (depends on 21) The ophthalmic method according to claim 21, further comprising capturing a fundus image of the eye to be inspected using the second light, the second light being visible light and being changed according to the changing. ### Claim 23 (depends on 17) The ophthalmic method according to claim 17, further comprising moving, when the irradiation position of the first light is out of the range, an irradiation position of the second light with respect to the eye to be inspected. ### Claim 24 (depends on 23) The ophthalmic method according to claim 23, further comprising capturing a fundus image of the eye being inspected using the second light, the second light being visible light and being positioned with respect to the eye being inspected according to the moving. ### Claim 25 (depends on 17) The ophthalmic method according to claim 17, wherein determining, in the determining step, is based on at least one of brightness of the fundus image of the eye to be inspected in the irradiation position of the first light and a distance between the fundus image and the ocular axis. ### Claim 26 (depends on 17) The ophthalmic method according to claim 17, further comprising generating a fundus image of the eye to be inspected using infrared light, wherein determining, in the determining step, is based on the infrared fundus image, regarding whether the irradiation position of the second light will be within the range. ### Claim 27 An ophthalmic method comprising: irradiating an eye to be inspected with a first light to capture a tomographic image of the eye to be inspected; and moving, when an irradiation position of the first light in the eye to be inspected is out of a range, an irradiation position of the second light with respect to the eye to be inspected; and irradiating, after the moving, the eye to be inspected with a second light to capture a fundus image of the eye to be inspected, the diameter of an irradiation area of the second light in the eye to be inspected being larger than the diameter if ab urraduatuib area of the first light in the eye to be inspected. ### Claim 28 (depends on 27) The ophthalmic method according to claim 27, further comprising capturing a fundus image of the eye to be inspected using the second light, the second light being visible light and being positioned according to the moving. ### Claim 29 (depends on 27) A non-transitory computer-readable storage medium for storing a computer program that causes a computer to execute the ophthalmic method according to claim 27. ### Claim 30 An ophthalmic method comprising: irradiating an eye to be inspected with a first light to capture a tomographic image of the eye to be inspected; changing, when an irradiation position of the first light in the eye to be inspected is out of a range, the diameter of a second light to capture a fundus image of the eye to be inspected to be a smaller diameter, the second beam having a diameter of an irradiation area in the eye to be inspected larger than the diameter of an irradiation area of the first light in the eye to be inspected; and irradiating, after the changing, an eye to be inspected with the second light having the changed diameter. ### Claim 31 (depends on 30) The ophthalmic method according to claim 30, further comprising capturing a fundus image of the eye to be inspected using the second light, the second light being visible light and being changed according to the changing. ### Claim 32 (depends on 30) A non-transitory computer-readable storage medium for storing a computer program that causes a computer to execute the ophthalmic method according to claim 30. ### Claim 33 An ophthalmic method comprising: irradiating an eye to be inspected with a first light to capture a tomographic image of the eye to be inspected; determining, based on information indicating a shift amount between an irradiation position of the first light in the eye to be inspected and an ocular axis of the eye to be inspected, whether or not the irradiation position is within a range in which a refractive power of the eye to be inspected can be acquired; and irradiating, when the irradiation position of the first light is within the range, an eye to be inspected with a second light to acquire the refractive power, wherein the diameter of an irradiation area of the second light in the eye to be inspected is larger than the diameter of an irradiation area of the first light in the eye to be inspected. ### Claim 34 (depends on 33) A non-transitory computer-readable storage medium for storing a computer program that causes a computer to execute the ophthalmic method according to claim 33.